I'm very well aware of the difference of Unix and Linux. I even smiled slighty as he also could just have claimed Linux to not be Unix and that would have been undisputable.

I actually don't know what you mean with "criticism of UNIX traditionalists for years" in regards to the Linux kernel and the userland.

I know of Linus' disregard of POSIX where it's crappy or doesn't make any sense anymore in his opinion but that can't extend to the userland as Linus doesn't do userland.

Some clarification or links to said criticism would be welcome.